So what would your advice be out of all the turboback setups you have had, which combo gave you the least drone on the highway, near perfect/OEM fitment, and sounds great while giving you that stage 2 setup?

The Invidia DP is all you really need for stage 2. Cat backs don't gain you anything but noise. I like the sound of the SPT but this ARK is nice too. The Greddy was great if you like it a little louder.